Reciprocal motion device



`April 21, 1942. v. o. PouNDs l 2,280,261/

` RECIPROCAL MOTION DEVICE Filed Mach 17, 1941 4 shets-sheet 1 INVNTOR.I

AT-'ORNEY April 21;!1942.A v. Q POUNDS l2,280,261 REcIPRocAL MQTIN DEVICE' Y Filed March 17, 1941 4ShetS-Sheet o Q, f 3/ INVENTOR.

ATTRNEY Vesez' O. Pounds' I Aprilzl, 1942. QPQQNDa u, 2,280,261

\ v RECIPBOGAL MOTION DEV-10E Filled March 17, 1941 d 4 Sheets-Sheet 3 l .ma 21, 1942.

v. o., POUNDS i j2,280,261

l RECIPROCAL MOTION DEVICE Filed. March 17, 1941 y IG. 7 36 4 Sheets-Sheet 4` INVENTOR.

.BYVeSter O. Pounds ATTRNEY Patented` Apr. 21, 1942 l l t 2,280.2@A i RECIPROCAL Mo'roN DEVICE vestr o. Pounds, Eni-a, Okla. `Application March 17, 1941,; `Serial No. 383,732

3 Claims. (o1. 'f4- 57) This invention relates to a reciprocal `motion device and is` applied to anapparatus for driving oil pumps and has lfor an object to providea simplified device fort converting rotary movement v of a; driving unit intorectilinearmovement for reciprocating the polish rod of an oil pump.

A further object is to provide a device of this character in which the workingtube `and housing are provided with interfitting guides which coniine the working tubeto rectilinear movement.

A further object is` to provide `a device of this character in which the feed screw is provided with two reverselyarranged threads to reversev l the directionof the traveling nut and the working tubecarriedthereby at eachlimit vof stroke,

`the feed screw being hollow and receiving the polishrod which latter is supported by the working tube so thatall of the parts will be accurately centered to promote eiectve operation of the pump.

A further object is to providea device of this character which will be formed of a few strong simple and durable parts, whichwill bev inexpensive to manufacture, and which will not easily get out of order. k

A still further object is to the kind mentioned that is small `and compact enough that the entire device and powerunit therefor may be placed in a pit over an oil well and a cover may be placed over the pit so as to Still a `further object is that if the device as above mentioned is used on top oi` the ground in-k Fig. 3 is an enlarged detail plan view of the pumper device. Y

Fig. 4 is an enlargedl detail vertical sectional view through the pumps, the view being taken along the line IV-'IV in Fig. 3 `and looking in the direction of the arrows. Y

Fig. 5 is a detail cross sectional view through th-e pumper device, the View being taken along `the line V-V in Fig. 4 and looking in thev direction of the arrows.

Fig. `6 is an enlarged side view ofthe threaded y elevation tube.`

Fig. 7 is a front view ofthe tiltable .thread element.

Fig. 8 is a rear View of the tiltable thread element.

stead of in a ptfa much smaller building will be.

required` to house the power unit` and pumps than other devices now in use.` l

With the above and other objects in View the invention consists of certain novel details of construction andcombinations of parts hereinafter t FigjZ is another side view of the device, the

view being taken on an angle of lninety degrees toward the left of that shown in Fig. l.

. t 25` provide a device of Fig; 9 is a side 'view of the unable thread eiement. l

Fig. 10 is a top plan view of the tiltable thread i element. l o

Referring now to the drawings in which like characters of reference designate similar parts in the variousviews, I0 designatesla tubular feed screwhaving two reversely arranged threads II and I2. A traveling nut I3 is engaged with the threads and a working tube I4 is threadedly engaged with the traveling `nut as shown at I5 to be moved as unit with the nut.

is `adapted to be filled Vwith lubricant. As best shown in Fig. 4, the housing is provided with longitudinal guide` grooves I'I and the working nut I3 is provided with spaced guide ribs I8 which engage opposite sides of the guide grooves l I'I and prevent rotation of the working tube axially within the housingA I6.`

The upper end of the housing tube I6 is provided with a guide and cap element ISIl that is threaded or otherwise suitably attached thereon in such a manner that the tube I 4 slidably passes` therethrough. The working tube I4 slidably projects through the guide 20 and at the upper end is equipped with a clamp 2| which is secured to the upper end of a polish rod 22. The polish rod 22 extends axially through the tubular feed screw ID and at the lower end is secured to the pump string, not shown.

The lower end of the housing I6 is' seated in a 4 tached thereon is a thrust bearing assembly 24 and a radial bearing assembly 25 on and in which is supported the threaded elevator tube Il).

On the bottom end of the elevator tube I is rigidly attached a ily wheel element 26 on which is carried a worm wheel 2l that is bolted thereto and driven by a worm 28 that is carried on a shaft 29 that is rotatably carried in bearings carried within and between the walls of the housing 22 and a closure plate 3U for the bottom side of the housing 22 and which is bolted thereto. In the closure plate 30 is carried a conventional packing gland 3| for reasons that are obvious.

On the upper end of the working tube I4 is a closure nut 32 in the upper end of which is carried the lower part of a thrust bearing 33 and on which rests the upper part of the thrust bearing 33 which is seated in a cap element 34. Around the polished rod 22 and intermediate the cap 34 and the clamp 2I is a helical shock absorption spring 35.

Seated in the threads II or I2 is a tiltable threadY 36 that is integrally formed on a partial by force the elevator tube I4 to travel upwardly therewith and which in turn also lifts the polish rod 22 and pump rods attached thereto to operate the pump as will be readily understood.

Now as the tiltable thread element 36 reaches the top of the thread I I it will be guided through the thread connection passage D into the thread I2 which will move the tiltable thread and the vabove mentioned associated parts connected therewith in a downwardly direction until the tiltable thread 36 reaches the bottom of the thread I2 and is guided by the connecting thread ball element 31 on which is integrally formed a pin- 38 that is journalled in a bearing inthe nut Suspended on the other end of the wire elements 50 and 5I at opposite sides of the housing element I6 and supported by clamp elements 52 and 53 that are supported as the housing element I6 and cap element I 9. therefor.

In Figures l and 2 is shown a power unit 54 which in this case, is an electric motor. The power unit 54 is supported on a concrete base 55. The rotatable motor shaft 56 is connected in driving relationship with the shaft 29 of the pumperl device as will be readily understood.

As shown in Figures 1 and 2 the device is posi-` tioned in a pit having concrete walls A and which is covered with a cover element B that rests on the top of the walls A approximately at the ground 'level C.

In the pit is shown a stuffing boxv 56' and a discharge pipe 5l for the oil well pump, and over which is positioned the pumper device as shown.

The operation of the device is as follows: The power unit is started, whereupon the shaft 29 is revolved, whereupon the worm 38 drives the worm wheel 2 in a rotary motion and which in turn drives the threaded tube Ill in a rotary motion.

The rotary action of the thread II is such that the tiltable thread 36 is formed to travel upwardly with the rotating thread I I and therepassage E back into the thread II to repeat the up and down cycle just described for the pumping operation of the well.

Now having fully described my invention, I claim:

1. In a pumper device for wells; a housing element supported on legs, an elevator housing carried on the first said housing, an elevator element, said elevator element being housed within the elevator housing element being movable longitudinally therein and means incident to the elevator housing and the elevator therein for preventing the rotary movement of said elevator element, a rotatable tubular element positioned within said elevator element, said rotatable tubular element being carried in bearings carried by the rst said housing element, and means on one end of said rotatable tubular element for rotatably driving said rotatable tubular element, the outside of said rotatable tubular element having right and left hand threads therein that cross ends thereof, a tiltable thread element carried by said. elevator element and being positioned in said threads so as to elevate and lower said elevator element upon rotation of said rotatable element, a thrust bearing carried on the upper end of said elevator element, and means for supporting a pump actuating rod thereon.

2. In a pumper device for wells as dened in claim l, and pulley means on the top of said elevator housing, and exible means passed over and supported by said pulley means, one end of said flexible means being rigidly attached to the lower end of said elevator element, the other end of said flexible means being rigidly attached to weights as a means of counterbalancing the pump load.

3. In a pumper device for wells as dened in claim l, and pulley means on the top of said elevator housing, and ilexible means passed over and supported by said pulley means, one end of said exible means being rigidly attached to the lowerend of said elevator element, the other end of said exible means being rigidly attached to weights as a means of counterbalancing the pump load, said means for rotating said rotatable element being a worm, and power means for driving said worm;

VESTER o. POUNDSL 

